Signing in for a Hundred Years, from Sweeping the Floor to Being the Ancestor of the Immortal Sect

Traveling through the world of immortals, his qualifications are low, his path to immortality is cut off, and he becomes a sweeper of the Jingyun Sect's library. A lifetime of mediocrity and no hope of everlasting life? Awakening of the god-level sign-in system! "Congratulations to the host for signing in for the first time and obtaining the perfect level skill "Nine Transformations of True Spirit"!" ... Staying in the library, scanning the floor to sign in, my life was pleasant. Until this day, the world of immortality changed drastically. The demons invaded in large numbers and killed Jingyun Sect. They met Lin Cheng who was sweeping the floor and said, "Give way, you are disturbing my sweeping!"